Safety valve-stem.



N0; 893,184; {PATENTED JULY 14, 1903:"

' A. I. MERGER;

SAFETY VALVE STEM. APPLIOATION FILED MAY 1a, 1907.

attuned:

To all whom it may concern:

sTArEs PATENT} OFFICE.

A LEN-I. MERCER, OF MANNINeTou, WEST VIRGINIA.

SAFETY VALVE-STEM. v

Specification of Letters Patent.

Patented July 1 3:, race.

Application filed May '13, 1 901. Serial No. 313,479

- Be a known that ,1, ALLEN I. MERCER,

' citizen of the Unitedl Sta-tes, residing at Man nington the county of Marion a State of West 1r inia, have invented cemew and useful provements ln Safety Valve- Stems, of which-theffollowing is a specifica-.

' tion. I The present inventionhas for its object to provide novel means forpreventing the casual turning bf valves when adjusted to agiven point, or the accidental opening or closing of the same by the handle or operating means.

'The invent'on is particularly advantageous,- in connection with valvesdesigned for use on stoves or heaters of various-kinds usin gas or liquid fuel, although it may be used W ereever is required to safe ard a valve and prevent acc dental operatlon thereof. In accordance with this invention, the

valve stem comprises two, arts or members which normally are presse apart by means of an interposed sprin and catch between the members or parts, w ereby-u on properly directed "force, the tension of t e springs 1s overcome and the clutch elements brought together to admit of turning the valve stem .as a whole to effect desired movement of t e valve. I 1 For a full description ofthe invention and thelmerits thereof and also "to acquire a knowledge of the details of construction'and ing t einvention'. Fig 2 isa sectional view of the valve stemj showing the parts held separated by the ,interposed'spring. Fig. 3- is aview similar to Fig. 2 showing-the parts of the stem"pressed together to bring the clutch elements, into engagement whereby the valve may 1 Correspon ng and: like par-ts are referredto in the followin descriptlon-and indicated in all the views 0 the d'rawingsby the same reference characters. e The invention may be applied to any type coking or brushing agamst .fluid passing therethroug beopened, closed or adjusted,

I oflvalveadalpted to be actuated byrotating the stem. he stem of the valve comprises an Inner member or section 1- and an outer member orsection 3, saidsections being'movable longitudinally and having cooperating clutch elements 4 upon their meeting or opposing vends, where y when the sectionpr member 3 is pressed inward towards the memher or section 1, the clutch elements or teeth 4 arecausedto interlock so that the stem as a wholemay' be rotated either to the right or to the left to 0 en, close or' move the valve to any require point for pro er control of the The two sec tions or members 1 and 3 are connected by -means of a rod, 2 which may form a part of the member 1, or be secured theretoin any -manner.- The member or section- 3 is loose upon the rod or connection 2 so as to receiv both a longitudinal and a rotary movemen Theo crating handle 7 is fitted to the outer 'end' 0 the-section or member 3. A spring 5 is interposed between the members 1 an and normally exerts a pressure to force them apartso as to hold the clutch 8 or elements 4 separated, whereby the outer section 3 .prov1 ed with theoperating handle 7 'may turn freely without effecting movement of the;

valve either to open, to close or move the same from an adjusted osition. 'The ends .of the spring 5 ar seate in recesses formed in the o posing e ds of the members 1 andf}. The rd or connection 2 projects beyond the outer-end of the member 3 and is threaded toreceive a set nut 6. 3 may be pressed inward towards the member 1 and held in place with the clutch. teeth 4 If required, the member interlocked by turning the set nut 6 upon the";

threaded endof the rod 'or connection 2.

prevent accidental movement of the valve, 7'

-.the set nut 6 is. adjusted upon the'rod' 2 to permit the sprin -5' to force the member 3 handle be turned accidentally either by strikingfor brushing against the same, the

position of the valve will not be changed.

since'said handle turns freely without producing any movement'of the main portion of the stem 1 which operates the valve. 1

Having thus described-the invention, what is claimed as new-is:

upward and hol the clutch teeth or; ele-;

"ments 4 out of engagement, hence should the A valve stem comprising an inner member,

having its outer end portion reduced to form- 1 a rod whose outer extremity is threaded,;the

' end. portion atthe base of the rod being re--- cessedland the Wall surrounding said recess posing ends of the two members, and :1v set 10 having its outer end notched to form teeth,

nut mountedupon the threaded end of the an outer member slipped upon said rod and said rod.-

having its inner end recessed and the BX- In testimony whereof I. ejliix my signature tremity of the Wall surrounding said recess in presence of two Witnesses. notched to provide teeth to interlock with the ALLEN I. EXIERUER. [In s] teeth'of the inner member, a spring mounted Witnesses:

upon the inner ortion of said rod and seated ALoNzo PRICE, at Its ends 1n t e recesses formed in he op- C. E. HAWKENBERRY. 

